Help me please I will be doing more answer on this type so keep a look out

What are the domain and range of the function? f(x) = -4 (sqrt)x

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn. if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height